Digital computing device for a data transmission installation us

Details Digital computing device for a data transmission installation us Digital computing device for a data transmission installation us

1988-07-28

1990-06-05

Malzahn, David H.

Boots, shoes, and leggings

36472416, G06F 1531

Patent

active

049319809

ABSTRACT:
A device for real time computing of a sum of terms having the form .SIGMAiT).qe((n-i)T) is suitable for use in an echo canceller for a data transmission system using code 2B 1Q. The device first transforms each of the successive estimated values of qe into transformed values qde which are powers of two, by adding or subtracting 1. The successive elementary products each obtained by a shift of h by an amount selected in response to the respective value of qde. The elementary products are summed in a register.

REFERENCES:
patent: 3696235 (1972-10-01), Tufts et al.
patent: 3906218 (1975-09-01), Nussbaumer
patent: 3906400 (1975-09-01), Gooding et al.
patent: 3988606 (1976-10-01), Eggermont
patent: 4031378 (1977-06-01), Le Comte
patent: 4185325 (1980-01-01), Appel
patent: 4322810 (1982-03-01), Nakayama

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